US7200513B1 - Method for clocking speed using wireless terminal and system implementing the same - Google Patents

Method for clocking speed using wireless terminal and system implementing the same Download PDF

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Publication number
US7200513B1
US7200513B1 US11/372,388 US37238806A US7200513B1 US 7200513 B1 US7200513 B1 US 7200513B1 US 37238806 A US37238806 A US 37238806A US 7200513 B1 US7200513 B1 US 7200513B1
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Prior art keywords
frame
image data
pixel value
data frame
moving
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Ju-Seok Noh
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Definitions

  • the present invention relates to a method for clocking a speed using a wireless terminal. More particularly, the present invention relates to a method for clocking the speed of a moving object using a wireless terminal in a preview mode of a camera.
  • wireless terminals have been developed to include high-speed data transmission functions in addition to voice communication functions.
  • the wireless terminals performing such data communication may typically process both packet data and image data.
  • wireless terminals include a function for enabling image data to be transmitted and received. Therefore, the wireless terminals can store an image received from a base station and transmit an acquired image to the base station.
  • Such wireless terminals can include a camera for photographing an image and a display unit for displaying an image photographed by the camera.
  • the camera may be comprised of a CCD or CMOS sensor, and the display unit may be comprised of an LCD.
  • these camera units have also become miniaturized. When such camera units are incorporated therein, the wireless terminal can photograph an image to be displayed as a moving picture or a still picture, and can transmit a photographed image to the base station.
  • such a wireless terminal having a camera receives the image data of a moving object from the camera and included a function to clock and display the speed of the moving object, it would be possible to easily provide the user with a speed measurement service by using only the wireless terminal, without requiring a separate device for speed measurement.
  • an object of embodiments of the present invention is to provide a method for clocking the speed of a moving object using a wireless terminal in a preview mode of a camera.
  • a method for clocking a speed using a wireless terminal comprising a camera unit, the method comprising the steps of entering a preview mode for speed measurement when a speed measurement function is selected in a camera preview mode of the wireless terminal, measuring a moving distance of an object in the preview mode for speed measurement, measuring a moving time period of the object in the preview mode for speed measurement, and measuring and displaying a moving speed of the object by using the moving distance and moving time period of the object which have been measured.
  • a method for clocking a speed using a wireless terminal comprising at least two camera units, the method comprising the steps of entering a preview mode for speed measurement when a speed measurement function is selected in a camera preview mode of the wireless terminal, measuring a moving time period of the object by receiving image data of a moving object through the two camera units in the preview mode for speed measurement, measuring a moving distance of the object through the two camera units in the preview mode for speed measurement, and measuring and displaying a moving speed of the object by using the moving distance and moving time period of the object which have been measured.
  • FIG. 1 is a block diagram illustrating a construction of an exemplary wireless terminal according to an embodiment of the present invention
  • FIG. 2 is a flowchart illustrating an exemplary procedure of clocking the speed of a moving object by using a wireless terminal according to a first embodiment of the present invention
  • FIG. 3 is a view for illustrating the procedure shown in FIG. 2 ;
  • FIG. 4 is a flowchart illustrating an exemplary procedure of clocking the speed of a moving object by using a wireless terminal according to a second embodiment of the present invention.
  • FIG. 1 is a block diagram illustrating the construction of an exemplary wireless terminal having at least two camera units according to an embodiment of the present invention.
  • the wireless terminal comprises a controller 110 , a modem 120 , a radio frequency (RF) unit 123 , an audio processing unit 125 , a key input unit 127 , a memory unit 130 , a camera unit 140 , a video processing unit 150 , and a display unit 160 , but is not limited thereto.
  • the wireless terminal can further comprise at least one of an antenna ANT, a microphone MIC, and a speaker SPK.
  • the RF unit 123 performs the wireless communication functions of the wireless terminal.
  • the RF unit 123 comprises an RF transmitter and an RF receiver, in which the RF transmitter up-converts and amplifies the frequency of a signal to be transmitted, and the RF receiver low-noise amplifies a received signal and down-converts the frequency of the received signal.
  • the modem 120 comprises a transmitter for encoding and modulating the signal to be transmitted and a receiver for demodulating and decoding the received signal.
  • the audio processing unit 125 may comprise a codec, which itself comprises a data codec for processing packet data and the like, and an audio codec for processing an audio signal such as voice.
  • the audio processing unit 125 converts a digital audio signal received from the modem 120 into an analog signal by means of the audio codec, thereby reproducing the converted analog signal. Also, the audio processing unit 125 converts an analog audio signal for transmission generated from the microphone MIC into a digital audio signal by means of the audio codec, and transmits the converted digital audio signal to the modem 120 .
  • the codec may be separately constructed, or may be included in the controller 110 .
  • the memory 130 may comprise a program memory and a data memory.
  • the program memory may store programs for controlling general operations of the wireless terminal and programs for clocking the speed of a moving object in a camera preview mode for speed measurement according to embodiments of the present invention.
  • the data memory temporarily stores data generated while the programs are being executed.
  • the controller 110 preferably controls the entire operation of the wireless terminal.
  • the controller 110 may comprise the modem 120 and the codec.
  • the controller 110 controls one camera unit such that the controller 110 can measure and display the speed of a moving object by using the one camera unit in a camera preview mode for speed measurement.
  • the controller 110 controls two camera units such that the controller 110 can measure and display the speed of a moving object by using the two camera units in a camera preview mode for speed measurement.
  • the camera unit 140 comprises a first camera unit 141 and a second camera unit 142 , which are fixedly installed in the wireless terminal according to an embodiment of the present invention.
  • the camera unit 140 photographs an image, and comprises a camera sensor and a signal processing section.
  • the camera sensor converts an optical signal obtained through the photographing into an electric signal
  • the signal processing section converts an analog image signal obtained through the photographing of the camera sensor into digital data.
  • the signal processing section may comprise a digital signal processor (DSP).
  • DSP digital signal processor
  • the camera sensor and the signal processing section may be integrally or separately constructed.
  • the video processing unit 150 performs a function to generate image data for displaying an image signal output from the camera unit 140 .
  • the video processing unit 150 processes an image signal, which is output from the camera unit 140 , in a frame unit, and outputs the frame image data to be suitable for the screen size and properties of the display unit 160 .
  • the video processing unit 150 comprises a video codec so as to compress frame image data displayed on the display unit 160 by using a predetermined scheme and to restore original frame image data from compressed frame image data.
  • the video codec may comprise a JPEG codec, an MPEG4 codec, a Wavelet codec, and so forth. It is assumed for example, that the video processing unit 150 has an OSD (On Screen Display) function and can output OSD data according to the size of a display screen under the control of the controller 110 .
  • OSD On Screen Display
  • the display unit 160 displays an image signal output from the video processing unit 150 and user data output from the controller 110 on a screen.
  • the display unit 160 may employ a liquid crystal display (LCD).
  • the display unit 160 may comprise an LCD controller, a memory for storing image data, an LCD display element, and so forth.
  • the display unit 160 may further serve as an input section.
  • the display unit 160 may display the speed of a clocked object in a preview mode for speed measurement in the wireless terminal.
  • the key input unit 127 comprises keys for inputting numeral and character information, and function keys for setting various functions. Also, according to embodiments of the present invention, the key input unit 127 may comprise a specific function key for controlling the wireless terminal to clock the speed of an object.
  • FIG. 2 is a flowchart illustrating an exemplary procedure of clocking the speed of a moving object by using the wireless terminal according to a first embodiment of the present invention
  • FIG. 3 is a view for illustrating the procedure shown in FIG. 2 .
  • the first embodiment of the present invention will be described with respect to a procedure of clocking the speed of a moving object by using any one of the two camera units 141 and 142 (hereinafter, referred to as “camera unit 140 ”) and displaying the clocked speed.
  • the controller 110 senses it and proceeds to step 201 , in which the wireless terminal enters a camera preview mode.
  • the wireless terminal receives image data from the camera unit 140 and displays the received image data.
  • the controller 110 senses it in step 202 and proceeds to step 203 for switching the wireless terminal into a preview mode for speed measurement.
  • the speed measurement function may be selected in a menu of the wireless terminal.
  • the controller 110 senses it and may proceed to step 203 for switching the wireless terminal into the preview mode for speed measurement.
  • the controller 110 senses it in step 204 and proceeds to step 205 for extracting a starting position of a moving object in the preview mode for speed measurement of the display unit 160 .
  • the controller 110 stores pixel values of image data frames received through the camera unit 140 after the speed measurement execution is selected in step 205 , while comparing pixel values of each currently-received image data frame with pixel values of a previously-received image data frame.
  • the controller 110 determines that image data of an object, for which speed measurement is desired, is received and performs a control operation so that the currently-received image data frame is extracted as a start frame corresponding to a starting position of the object.
  • the starting position of the object is designated by reference mark “A 1 ”.
  • the controller 110 senses it and proceeds to step 206 for extracting a final position of the moving object in the preview mode for speed measurement of the display unit 160 .
  • the controller 110 stores pixel values of image data frames received through the camera unit 140 after the start frame is extracted in step 206 , while comparing pixel values of each currently-received image data frame with pixel values of a previously-received image data frame.
  • the controller 110 determines that image data of an object, for which speed measurement is desired, is no longer received and performs a control operation so that the received image data frame is extracted as a final frame corresponding to a final position of the object.
  • the final position of the object is designated by reference mark “A 3 ”.
  • the controller 110 adds the frame number of the start frame to the frame number of the final frame, and divides the sum by two, thereby extracting the frame number of a frame corresponding to an intermediate position of the object in the display unit 160 in step 207 .
  • the intermediate position of the object is designated by reference mark “A 2 ”.
  • step 207 the controller 110 proceeds to step 208 for extracting a distance between the camera unit 140 and the intermediate position “A 2 ” of the object, that is, distance “H” in FIG. 3 .
  • the controller 110 may extract the distance “H” between the camera unit 140 and the intermediate position “A 2 ” of the object by using the auto-focus function of the wireless terminal.
  • the auto-focus function may be performed at the moment when the speed measurement execution is selected in the preview mode for speed measurement.
  • the controller 110 may store distances between the camera unit 140 and each object included in all image data frames received from the camera unit 140 in the memory 130 .
  • the controller 110 may extract the distance “H” between the camera unit 140 and the intermediate position “A 2 ” of the object in step 208 , from the distances between the camera unit 140 and each object included in all image data frames, which have been stored in the memory 130 .
  • step 208 the controller 110 proceeds to step 209 for calculating a moving distance “D” of the object according to Equation (1) below,
  • step 209 the controller 110 proceeds to step 210 for calculating a moving time period “T” of the object according to Equation (2) below.
  • T (Final Frame ⁇ Start Frame) ⁇ Time Period Per Frame (2)
  • the term “Start Frame” represents the frame number of the start frame corresponding to the starting position “A 1 ” of the object, and the start frame number of the object extracted in step 205 is substituted for the “Start Frame”.
  • the term “Final Frame” represents the frame number of the final frame corresponding to the final position “A 3 ” of the object, and the final frame number of the object extracted in step 206 is substituted for the “Final Frame”.
  • the term “time Period Per Frame” represents a time period required for receiving one frame through the camera unit 140 . The time period required for receiving one frame may be calculated by using the number of received frames per second.
  • step 211 the speed of the object is calculated according to Equation (3) below, and the calculated speed is displayed.
  • step 211 When a storing function is selected in step 211 when displaying the calculated speed of the object, the controller 110 senses it in step 212 and proceeds to step 213 for storing the displayed speed of the object.
  • step 214 the controller 110 senses it in step 214 and performs a control operation such that the preview mode for speed measurement is ended.
  • the wireless terminal may be switched either into the camera preview mode of step 201 or into a waiting mode.
  • FIG. 4 is a flowchart illustrating an exemplary procedure of clocking the speed of a moving object by using the wireless terminal according to a second embodiment of the present invention.
  • the second embodiment of the present invention will be described with respect to a procedure of clocking the speed of a moving object using the first and second camera units 141 and 142 and displaying the clocked speed.
  • the controller 110 senses it and proceeds to step 401 , in which the wireless terminal enters a camera preview mode.
  • the wireless terminal receives image data from the camera unit 140 and displays the received image data.
  • the controller 110 senses it in step 402 and proceeds to step 403 for switching the wireless terminal into a preview mode for speed measurement.
  • the speed measurement function may be selected in a menu of the wireless terminal.
  • the controller 110 senses it and may proceed to step 403 for switching the wireless terminal into the preview mode for speed measurement.
  • the first camera unit 141 and the second camera unit 142 simultaneously photograph and display an image.
  • the display unit 160 may display two separate windows in order to simultaneously display an image received from the first camera unit 141 and an image received from the second camera unit 142 .
  • the reception of image data through the first and second camera units 141 and 142 may be performed in the camera preview mode of step 401 , or may be automatically or selectively performed in the preview mode for speed measurement of step 403 .
  • step 404 When a speed measurement execution is selected in the preview mode for speed measurement in which image data is received simultaneously through the first and second camera units 141 and 142 , the controller 110 senses it step 404 and proceeds to step 405 and step 406 .
  • step 405 a first intermediate frame corresponding to the intermediate position of a moving object is extracted from image data received from the first camera unit 141 .
  • step 406 a second intermediate frame corresponding to the intermediate position of a moving object is extracted from image data received from the second camera unit 142 .
  • step 405 when speed measurement execution is selected in the preview mode for speed measurement, the controller 110 performs a control operation such that a starting position of a moving object is extracted in the preview mode for speed measurement of the display unit 160 on which image data received through the first camera unit 141 is displayed.
  • the controller 110 stores pixel values of image data frames received through the first camera unit 141 after the speed measurement execution is selected, while comparing pixel values of each currently-received image data frame with pixel values of a previously-received image data frame.
  • the controller 110 determines that image data of an object, for which speed measurement is desired, is received and performs a control operation so that the currently-received image data frame is extracted as a start frame corresponding to a starting position of the moving object.
  • the controller 110 senses it and performs a control operation such that a final position of the moving object is extracted in the preview mode for speed measurement of the display unit 160 .
  • the controller 110 stores pixel values of image data frames received through the first camera unit 141 after the start frame is extracted, while comparing pixel values of each currently-received image data frame with pixel values of a previously-received image data frame.
  • the controller 110 determines that image data of an object, for which speed measurement is desired, is no longer received and performs a control operation so that the received image data frame is extracted as a final frame corresponding to the final position of the object.
  • the controller 110 adds the frame number of the start frame to the frame number of the final frame and divides the sum by two, thereby extracting the frame number of a first intermediate frame corresponding to an intermediate position of the moving object.
  • step 406 the frame number of a second intermediate frame corresponding to an intermediate position of the moving object may be extracted from image data received through the second camera unit 142 at the same time and in the same manner as described in regard to step 405 .
  • the controller 110 extracts a reception time of the first intermediate frame received from the first camera unit 141 and a reception time of the second intermediate frame received from the second camera unit 142 . Then, the controller 110 proceeds to step 407 for obtaining a moving time period “T” of the object by calculating a difference between the reception time of the first intermediate frame and the reception time of the second intermediate frame.
  • the first camera unit 141 and the second camera unit 142 are fixedly installed in the wireless terminal. Therefore, the controller 110 can obtain a moving distance “D” of the object according to the distance between the positions at which the first and second camera units 141 and 142 have been installed in step 408 .
  • step 409 the speed of the object is calculated according to Equation (3) repeated below, and the calculated speed is displayed.
  • step 409 When a storing function is selected in step 409 when displaying the calculated speed of the object, the controller 110 senses it in step 410 and proceeds to step 411 for storing the displayed speed of the object.
  • step 412 the controller 110 senses it in step 412 and performs a control operation such that the preview mode for speed measurement is ended.
  • the wireless terminal may be switched either into the camera preview mode of step 401 or into a waiting mode.
  • a wireless terminal can measure and display the moving speed of an object in a camera preview mode, so that the user can easily measure the moving speed of an object by using only the wireless terminal, even without a separate device for speed measurement.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
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  • Studio Devices (AREA)
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US20100064803A1 (en) * 2008-09-17 2010-03-18 Shoot The Balls Oy Techniques for determining a velocity of a sport object
US20100069015A1 (en) * 2008-09-17 2010-03-18 Entetrainer Oy Techniques for determining a velocity of a sport object
CN101943969A (zh) * 2009-07-07 2011-01-12 Smc株式会社 位置测量设备和位置测量方法
US20140168424A1 (en) * 2011-07-21 2014-06-19 Ziv Attar Imaging device for motion detection of objects in a scene, and method for motion detection of objects in a scene

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CN101753708A (zh) * 2008-12-22 2010-06-23 康佳集团股份有限公司 可以测速的手机以及该手机测量物体运动速度的方法
CN102098377B (zh) * 2010-12-02 2014-01-15 惠州Tcl移动通信有限公司 手机及手机测速方法
CN102353805B (zh) * 2011-06-17 2012-09-12 中国计量学院 一种测定风传植物种子垂直沉降速度的装置及方法
CN102967721A (zh) * 2012-11-13 2013-03-13 广东欧珀移动通信有限公司 通过连拍计算物体运动的速度绝对值的方法及移动终端
CN103327251B (zh) * 2013-06-24 2016-03-02 腾讯科技（深圳）有限公司 一种多媒体拍摄处理方法、装置及终端设备
CN104569482B (zh) * 2014-12-31 2018-01-16 江苏大学 一种高速液体射流表面速度测量装置和方法
CN104714048B (zh) * 2015-03-30 2017-11-21 上海斐讯数据通信技术有限公司 一种用于移动物体移动速度的检测方法及移动终端
CN105208285B (zh) * 2015-10-15 2019-02-01 Oppo广东移动通信有限公司 一种基于超声波的拍照方法及装置
CN106199036A (zh) * 2016-06-28 2016-12-07 兰建龙 一种用于智慧公园中的测速桩及利用测速桩测速的方法
CN107462500A (zh) * 2017-07-29 2017-12-12 太原理工大学 基于piv系统煤泥絮团粒度和沉降速度的同步测定方法

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Cited By (6)

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US20100064803A1 (en) * 2008-09-17 2010-03-18 Shoot The Balls Oy Techniques for determining a velocity of a sport object
US20100069015A1 (en) * 2008-09-17 2010-03-18 Entetrainer Oy Techniques for determining a velocity of a sport object
US8406698B2 (en) * 2008-09-17 2013-03-26 Entetrainer Oy Techniques for determining a velocity of a sport object
CN101943969A (zh) * 2009-07-07 2011-01-12 Smc株式会社 位置测量设备和位置测量方法
CN101943969B (zh) * 2009-07-07 2013-05-08 Smc株式会社 位置测量设备和位置测量方法
US20140168424A1 (en) * 2011-07-21 2014-06-19 Ziv Attar Imaging device for motion detection of objects in a scene, and method for motion detection of objects in a scene

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KR100651521B1 (ko) 2006-11-30
CN1984248A (zh) 2007-06-20

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